FR3000874A1 - Overshoe for use on pusher shoe of user of child's scooter to improve propulsion of scooter in sports, has sole whose thickness at support zones on ground lies between six and seventeen percentage of total length of overshoe - Google Patents

Abstract

The overshoe (1) has a sole (2) and a stem placed above a thrust shoe (18) of a user of child's scooter. The sole includes a front part at its base curved toward top such that height of a point of intersection between a front end and a median vertical longitudinal plane of the overshoe lies between 12 and 30% of total length of the overshoe. A distance between the point and an intersection point between a front end of an inner face of the sole and the plane lies between 5 and 14% of the total length. Thickness of the sole at support zones on ground lies between 6 and 17% of the total length.

Description

The present invention relates to an over-shoe intended to be put in place above the push shoe of a user of the scooter to improve the propulsion of a scooter.

In the state of the prior art we find devices to protect the wear of the sole of the push shoe as disclosed in FR2811521. The purpose of the present invention is to provide a device for the user of the scooter allowing him to propel more effectively and more comfortably his scooter. Another purpose also is to offer a broader protection of the shoe ensuring the pushing, protecting the sole of the wear but also by protecting the lower part of the shoe from splashing in rainy weather. The user of a scooter operates a flexion of the lower limb resting on the support plate of the scooter at the time of propulsion to compensate the height of this support relative to the ground and allow the other lower limb to reach the ground to ensure the push. The originality of this invention is to make up completely or partially the difference in height of the foot resting on the support plate of the scooter on the one in contact with the ground at the time of propulsion by securing the boot of the foot push one on -shoes having a sole adapted. The over-shoe to put in place on the shoe ensuring the thrust optimizes the ride on scooters but represents a handicap for walking. One foot, that of pushing, is higher than the other because of the wearing of the over-shoe. This imbalance causes a claudication. It is for this reason that the over-shoe according to the invention is designed so that it can be put in place and removed easily. The catch of the difference in height of the foot resting on the support plate of the scooter on the one in contact with the ground at the time of the propulsion favors the increase of the amplitude of the thrust, which makes it possible to collect more energy and to propel the scooter more quickly. The catch-up also makes it possible, in the hypothesis of an amplitude of thrust equivalent to that which would be carried out without an over-shoe, to bring a comfort of use in terms of the position of the user on his scooter.

According to the use made of the overshoe by the user of the scooter, the improvement can be in terms of sports performance, comfort of use or a combination of both. This invention also has the advantage of protecting splashes and wear from the sole of the shoe providing the thrust which is wholly or partially wrapped by the overshoe. The overshoe according to the invention comprises a sole and a rod.

The over-shoe extends a total length, L, from the back end or heel to a front end or tip, in width between the side edge and the medial edge and in height from the sole to a upper end. The sole extends in length from the heel to the tip and in width between the two lateral sides. The sole also extends in height, or thickness, between the free face and the inner face. Of course the free face is intended to be in contact with the ground. The inner face or binding, meanwhile, is used to secure the sole of the rest of the shoe, for example by gluing. The inside of the overshoe extends in length from the heel to the tip. The rod and the sole may be in one piece obtained molding with a light and elastic material such as polyurethane, polyamide, polyethylene or EVA. The stem consists of a posterior part, surrounding and marrying the external face of the shoe at the level of the heel of the user, and an anterior part, extending on both sides of the shoe at the level of the vamp. The anterior portion has a lateral wing and a medial wing which facilitate the introduction of the shoe. The over-shoe allows ventilation of the shoe by means of holes distributed around the perimeter of the upper or by the use of adequate materials at the stem to evacuate perspiration and / or heat while being waterproof . In order to correctly maintain the shoe in the overshoe, the overshoe comprises on the upper a link connecting the medial edge and the lateral edge in a releasable and repositionable manner which may take the form of flexible or elastic straps of any material adjusted by means of closure elements of the type hooks and self-gripping loops or other means to ensure a separable and repositionable closure. The elastic link will be adjusted by the user to adapt to the outer forms of the shoe to be maintained in the over-shoe. The material constituting the sole meets criteria of lightness and elasticity in order to optimize its deformation, the support on the ground. The material used to form the soleplate, without this list being limiting, may be of polyurethane, polyamide, polyethylene or EVA type. - 3 - An outsole can be added to the sole by any means, such as gluing. In this case, it is the outsole that will be in contact with the ground. The latter will be provided in flexible and elastic material, such as a rubber or materials having a good coefficient of friction.

The sole has, at its base, a front portion of a length of between 25 and 40% of the total length, L, of the overshoe, curved upwards, so that the height, H1, of the point , T, intersection point between the front end and the median vertical longitudinal plane, P2, of the overshoe, is between 12 and 30% of the total length, L, of the overshoe.

The important end survey and the thickness of the sole make the distance, L4, between the point, T, point of intersection between the front end and the median vertical longitudinal plane, P2, of the overshoe, and the point, R, the point of intersection between the front end of the inner face of the sole and the median vertical longitudinal plane of the over-shoe, P2, is between 5% and 14% of the total length, L, of the over-shoe. The thickness of the sole at the level of the support zones on the ground is between 6 and 17% of the total length, L, of the overshoe. Note that the sole is extended forward like a ski spatula whose tip would be cut in such a way that the outline of the sole projected on the ground has a front end in the shape of a straight segment. substantially perpendicular to the median vertical longitudinal plane, P2, of the overshoe and of a length, L6, of between 5 and 30% of the total length, L, of the overshoe. The sole, apart from the curved raised front part, is substantially flat in order to facilitate the use and access to the existing braking system on many scooters at the rear wheel and to allow better thrust by increasing the friction surface. . The over-shoe includes reflex reflectors, reflective devices, illuminating or flashing devices around the perimeter of the overshoe to improve the visibility of its user.

According to a variant of the invention, the forms of the over-shoe are generally symmetrical with respect to the median vertical longitudinal plane, P2, to allow the over-shoe to fit indifferently on a right or left shoe. Other advantages and features of the invention will be better understood from the description which follows, with reference to the appended drawing illustrating, according to non-limiting embodiments, how the invention can be realized, and in which: - Figure 1 is a side view of the supershoe according to the invention in the situation, - Figure 2 illustrates possible report in terms of propulsion of the over-shoe by comparing the magnitude of the thrust a user of scooters with and without overshoes, - Figure 3 illustrates the contribution in terms of comfort of the over-shoe by comparing the position of the scooter user with and without overshoe for the same amplitude FIG. 4 is a side view of the overshoe according to the invention, FIG. 5 is a view from below the overshoe, FIG. 6 is a view in longitudinal section along AA of FIG. FIG. 5; FIG. 7 is a side view of the overshoe according to FIG. the invention at the time of setting up the shoe. A scooter, as can be seen in Figure 1, comprises a support plate (39) for receiving one or two user feet. As also shown in Figure 1, the supershoe (1) is placed on the shoe ensuring the pushing movement (18) of a scooter user while the other shoe (17) remains supported on the support plate (39). Figures 2 and 3 illustrate how the over-shoe according to the invention can increase the thrust and provide comfort to the user of the scooter. In Figures 2 and 3, we model the lower limb as links.

According to a commonly accepted decomposition, the lower limb is decomposed into three links. The first link is the femoral or thigh region, which is the part between the hip and the knee. The second link is the crural area where the leg is the part between the knee and the ankle. The third link is the foot region. The lengths of the three links in the schemas have the same ratio of proportions as those commonly accepted to represent the three elements in the representation of the human body. The links are articulated between them with limits depending on the articular flexibility of the person. It is considered in Figures 2 and 3 that the feet symbolized by triangles are shod. The triangles therefore represent the position of the shoes of the user. The overshoe (1) shown in Figures 2 and 3 has a sole parallel to the foot so that the angle of the shoe with the horizontal is the same as that of the foot. Figures 2 and 3 address the notion of thrust amplitude of a scooter user with or without the overshoe. The thrust amplitude is defined by the distance measured between the position of the point, B1, the point of first contact with the ground at the beginning of the thrust, and the point, B2, corresponding to the point of last contact with the ground at the end of the thrust. . FIG. 2 compares the thrust amplitude, L1, in the left diagram of a user not equipped with the overshoe with the thrust amplitude, L2, in the diagram on the right of the same user equipped with the over-shoe (1). In both diagrams, the angular positions, relative to the ground, at the start of the thrust at the point B1 of the assembly consisting of the links of the foot and the leg are the same. It is the same at the end of push in point B2. These same conditions of departure and arrival, at the level of the leg and the foot, are taken in order to be able to compare the amplitudes of thrust in the same articular constraints at the level of the ankle.

The choice to bring the limits of the thrust to the flexibility of the ankle before that of the hip and knee results from the observation. Thus the inclination of the foot with the horizontal, 01, and the leg with the foot, 02, at the beginning of the propulsion and the inclination of the foot with the horizontal, 03, and leg with the foot, 04 , at the end of propulsion are identical in the two schemes.

The support on the scooter remains the same in both diagrams. It can be seen that the difference of the amplitudes L1 and L2 between the schemes is notable. The placing of the over-shoe allows the thigh to increase the amplitude of the thrust as evidenced by the superiority of the angle, 06, on the angle 05. 06 denotes the angle between the inclination the thigh at the beginning of the push and the inclination of the same thigh arrived at the end of the push of the user equipped with the over-shoe. 05 designates the angle between the inclination of the thigh at the beginning of the push and the inclination of this same thigh end of the push of the same user without over-shoe. Figure 3 compares in the diagram on the left, the position of the user not equipped with the over-shoe pushing an amplitude, L3, and in the diagram on the right the new position of the same user equipped with the sur- shoe (1) for the same thrust amplitude, L3. In both diagrams, the alignments of the links of the thigh, the leg and the foot ensuring the initial thrust at the point, B1, are identical in order to compare the modification of the position of the user on the scooter in the same constraints. joint. Thus the inclination of the thigh with the horizontal, 09, of the leg with the horizontal, 07, and of the leg with the foot, 08, at the beginning of the propulsion are identical in both diagrams.35 - 6 - In the diagram on the right, the dashed line shows the position of the foot resting on the scooter of the user not equipped with the over-shoe as it appears right in the figure on the left. It is found that the wearing of the over-shoe allows the user of the scooter for the same amplitude of thrust to hold a more comfortable position by decreasing the flexion of the thigh on the leg of the foot resting on the support plate (39) of the scooter. There is less bending, by comparing the angle, 011, existing between the thigh and the leg of the foot resting on the support plate (39) of the scooter for a user equipped with the over-shoe with the angle, 010, existing between the thigh and the leg of the same user without overshoes. Referring indifferently to Figures 4 to 7, there is an over-shoe (1) consisting essentially of a sole (2) and a rod (3). It will be seen in particular with reference to FIGS. 4 and 6 that the overshoe (1) extends a total length, L, from the rear end or heel (4) to a front end or toe (5). ), in width between the medial edge (6) and the lateral edge (7) and in height from the sole (2) to an upper end (9). It is also seen that the sole extends in length from the heel (4) to the tip (5) and in width between the medial edge (6) and the lateral edge (7). The sole (2) 20 also extends in height, or thickness, between the free face (8) and the inner face (10). Of course the free face (8) is intended to be in contact with the ground. The inner face or connecting (10), in turn, is used to secure the sole (2) to the rod (3), for example by gluing. As shown in Figures 4 to 7 and in the preferred embodiment, the rod (3) and the sole (2) is in one piece obtained by molding EVA (ethylene-vinyl acetate). In this preferred embodiment, the sole of the shoe is in direct contact with the inner face (10) of the sole of the over-shoe (2). In Fig. 5, the sectional plane shown as A-A corresponds to the median vertical longitudinal plane of the overshoe. It can be seen in FIG. 6 that the accommodation of the over-shoe for receiving the boot extends from the inner edge (11) of the heel to the inner edge (12) of the tip. FIG. 7 shows that the shank (3) consists of a posterior part, surrounding and conforming to the external face of the boot at the user's heel, and an anterior part (22), extending on both sides of the user's shoe at the level of the upper. It can be seen that the anterior portion (22) comprises two lateral wings, the medial wing (23) and the lateral wing (24) which facilitate the introduction of the shoe (18). The over-shoe allows ventilation of the shoe by holes (16) distributed around the perimeter of the rod as seen in Figure 4 or by the use of adequate materials at the stem to remove perspiration and / or heat while being waterproof. The ventilation holes (16) on the side edges as they appear in Figure 4 are made by punching. In another embodiment, they can be integrated into the mold of the over-shoe.

In order to correctly maintain the boot, the overshoe comprises on the upper (3) a link connecting the medial edge (6) and the lateral edge (7) in a releasable and repositionable manner which may take the form of flexible or elastic straps in all materials adjusted by means of closing elements such as hooks and self-gripping loops or other means to ensure a separable and repositionable closure. The elastic link (14) will be adjusted by the user to adapt to the outer forms of the shoe to be maintained in the over-shoe. According to the preferred embodiment illustrated in Figures 4 to 7, the elastic link is constituted by an elastic band (14), one end of which is secured to the medial wing (23) by gluing and whose other end wears self-gripping loops. On the lateral flange (24) is secured by gluing self-gripping hooks (15) on which the strip (14) can be fixed. The self-gripping hooks glued on the lateral wing (24) rather than on the medial wing (23) of the overshoe limits the risk of inadvertent fixation or gene with the clothes or the sock of the remaining foot. resting on the support plate (39). We will detail the sole (2). The material constituting the sole meets criteria of lightness and elasticity in order to optimize the support on the ground by its deformation. The material used to form the soleplate, without this list being limiting, may be of polyurethane, polyamide, polyethylene or EVA type. In the preferred embodiment, the material used is EVA. An outsole may be added to the sole (2) by any means, such as gluing. In this case, it is the outsole that will be in contact with the ground. This latter will be provided with flexible and resilient material, such as rubber or materials having a good coefficient of friction. In the preferred embodiment, the overshoe does not have an added outsole. The sole is remarkable for its large thickness and its shape designed to prolong contact with the ground at the time of propulsion.

The sole is raised on its front part curved upwards in order to optimize the surface in contact with the ground of the over-shoe at the end of the support when the overshoe is only in contact with the tip (5). ) and ready to leave the ground. The sole (2) has, at its base as shown in Figure 6, a front portion (20) of a length, L5, between 25 and 40% of the total length, L, of the overshoe, curved upward, so that the height, H1, of the point, T, point of intersection between the front end and the median vertical longitudinal plane, P2, of the overshoe, is between 12 and 30% of the total length, L, of the over-shoe. The most important survey and the thickness of the soleplate (2) make the distance, L4, between the point, T, the point of intersection between the front end and the median vertical longitudinal plane, P2, of the surface. shoe, and the point, R, intersection point between the front end of the inner face (10) of the sole and the median vertical longitudinal plane of the over-shoe, P2, is between 5 and 14% of the total length, L, of the over-shoe.

The thickness of the sole (2) at the support zones on the ground is between 6 and 17% of the total length, L, of the overshoe. In order to optimize the friction surface at the end of support and in the preferred embodiment, as seen in FIG. 5, the sole is extended in the manner of a ski spatula whose tip would be cut off from such so that its contour projected on the ground has a front end having the shape of a line segment (21) substantially perpendicular to the median vertical longitudinal plane, P2, of the supershoe and of a length, L6, between 5 and 30% of the total length, L, of the overshoe. The sole, apart from the curved raised front portion (20), is substantially flat in order to facilitate use and access to the existing braking system on many scooters at the rear wheel and to allow better thrust by increasing the friction surface. In the preferred embodiment and shown in FIGS. 1 and 4 to 7, the overshoe exists for each size in a straight version intended to be put in place on a right shoe and a left version intended to be put in place. place on a left shoe. This embodiment optimizes the adjustment of the over-shoe on the shoe. - 9 - The user acquires according to his natural foot of push the adapted shoe. According to a variant of the invention, the forms of the over-shoe are generally symmetrical with respect to the median vertical longitudinal plane (P2) to allow the over-shoe to fit indifferently on a right or left shoe. Strips (13) of reflective material are glued on the front (5), the back (4), the medial edge (6) and the lateral edge (7) of the over-shoe as seen in Figure 4 .

In any case the invention is made from materials and according to processing techniques known to those skilled in the art. Naturally, the invention is not limited to the embodiments described above, and includes all technical equivalents that fall within the scope of the claims that follow.

The present invention applies to the realization of an over-shoe intended to be placed on the push shoe of a scooter user. According to the use of the invention, the improvement made to its user can be in terms of sports performance, comfort of use or a combination of both.

The invention also provides protection against wear and dirt of the shoe used for thrust. Finally, it allows a better visibility of the user by the presence of reflective or illuminating devices on its periphery.

Claims (4)

CLAIMS1) Overshoe (1) comprising a sole (2) and a rod (3) intended to be put in place above the boot (18) of thrust of a scooter user, characterized in that the sole (2) comprises, at its base, a front portion (20) of a length (L5) of between 25 and 40% of the total length (L) of the over-shoe, curved upwards, so that that the height (H1) of the point (T), the point of intersection between the front end and the median vertical longitudinal plane (P2) of the overshoe, is between 12 and 30% of the total length (L) of the overshoe, and in that the distance (L4) between the point (T), intersection point between the front end and the median vertical longitudinal plane (P2) of the overshoe, and the point ( R), intersection point between the front end of the inner face (10) of the sole and the median vertical longitudinal plane of the over-shoe (P2), is between 5 and 14% of the long total ur (L) of the over-shoe, and in that the thickness of the sole (2) at the bearing areas on the ground is between 6 and 17% of the total length (L) of the on-shoe. 2) Overshoe, according to claim 1, characterized in that the contour of the sole (2) projected on the ground has a front end having the shape of a line segment (21) substantially perpendicular to the median vertical longitudinal plane (P2) of the over-shoe and a length (L6) of between 5 and 30% of the total length (L) of the over-shoe. 3) Overshoe according to claim 1 or claim 2, characterized in that the overshoe comprises on the rod (3) a link connecting the medial edge (6) and the lateral edge (7) separably and repositionable that can take the form of flexible or elastic straps adjusted through closure elements. 4) Overshoe according to claim 1 or claim 2, characterized in that the overshoe comprises on the rod (3) a link connecting the medial edge (6) and the lateral edge (7) separably and repositionable which can take the form of flexible or elastic straps adjusted by means of closure elements of the type hooks and self-gripping loops.) Overshoe, according to claim 1 or claim 2, characterized in that the rod (3 ) and the sole (2) are a single piece obtained molding with a light and elastic material such as polyurethane, polyamide, polyethylene or EVA. 6) Overshoe, according to claim 1 or according to claim 2, characterized in that the over-shoe comprises reflex reflectors, reflecting devices (13), flashing devices or flashes around the perimeter of the shoe. 7) Overshoe according to claim 1 or claim 2, characterized in that the overshoe allows ventilation of the shoe by means of holes (16) distributed around the periphery of the rod or by the use of suitable materials at the stem to evacuate perspiration and / or heat while being impermeable. 8) Overshoe, according to claim 1 or claim 2, characterized in that the supershoe has on its front portion (22) a lateral wing (24) and a medial wing (23) which facilitate the introduction of the shoe. 9) Overshoe according to claim 1 or claim 2, characterized in that the forms of the over-shoe are generally symmetrical relative to the median vertical longitudinal plane (P2) to allow the over-shoe of s to adapt indifferently to a right or left shoe.